仿生构筑超薄MXene/CNC电磁屏蔽复合薄膜

doi:10.15541/jim20190148

无机材料学报 ›› 2020, Vol. 35 ›› Issue (1): 99-104.DOI: 10.15541/jim20190148 CSTR: 32189.14.10.15541/jim20190148

所属专题： MAX相和MXene材料；功能陶瓷论文精选(二)；【虚拟专辑】层状MAX，MXene及其他二维材料

仿生构筑超薄MXene/CNC电磁屏蔽复合薄膜

刘张硕,刘骥,戴洋,李晓锋,于中振,张好斌()

北京化工大学材料科学与工程学院, 北京100029

收稿日期:2019-04-11 修回日期:2019-07-05 出版日期:2020-01-20 网络出版日期:2019-09-12
作者简介:刘张硕(1994-), 女, 硕士研究生. E-mail:Liu_zhangshuo@163.com
基金资助:
国家自然科学基金项目(51673015);国家自然科学基金项目(51373011);国家自然科学基金项目(51533001);中央高校基本业务费项目(BHYC1707B)

Bioinspired Ultrathin MXene/CNC Composite Film for Electromagnetic Interference Shielding

LIU Zhang-Shuo,LIU Ji,DAI Yang,LI Xiao-Feng,YU Zhong-Zhen,ZHANG Hao-Bin()

College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029

Received:2019-04-11 Revised:2019-07-05 Published:2020-01-20 Online:2019-09-12
About author:LIU Zhang-Shuo(1994-), female, Master candidate. E-mail:Liu_zhangshuo@163.com
Supported by:
National Natural Science Foundation of China(51673015);National Natural Science Foundation of China(51373011);National Natural Science Foundation of China(51533001);Fundamental Research Funds for the Central Universities(BHYC1707B)

摘要/Abstract

摘要：

高强电磁屏蔽薄膜材料在柔性器件、汽车电子和航空航天等领域具有广泛应用前景, 受珍珠母微纳米结构及其优异机械性能的启发, 利用简单的溶液共混及真空抽滤方法, 将纤维素纳米晶(CNC)和MXene混合, 经层层组装制备了高性能MXene基复合薄膜。结果表明: 薄膜的机械性能有了显著提高, 拉伸强度从18 MPa提高到57 MPa, 韧性从70 kJ/m ³提高到313 kJ/m ³, 同时保留了复合薄膜的高电导率(10 ⁴ S/m)和优异的电磁屏蔽性能, 厚度8 μm时可达40 dB以上。

关键词: MXene, 力学性能, 电磁屏蔽

Abstract:

Electromagnetic interference (EMI) shielding films with excellent mechanical properties are highly promising for applications in flexible devices, automotive electronics and aerospace. Inspired by the excellent mechanical properties of nacre derived from its micro/nanoscale structure, high-performance MXene/Cellulose nanocrystals (CNC) composite films were prepared by simple solution blending and followed vacuum-assisted filtration process. The presence of CNC significantly improves the mechanical properties with tensile strength increasing from 18 MPa to 57 MPa and toughness improving from 70 kJ/m ³ to 313 kJ/m ³. Meanwhile, the composite film still exhibits high electrical conductivity (up to 10 ⁴ S/m) and excellent EMI shielding efficiency (over 40 dB) with a small thickness of 8 μm.

Key words: MXene, mechanical property, electromagnetic interference shielding

中图分类号:

TB321

刘张硕, 刘骥, 戴洋, 李晓锋, 于中振, 张好斌. 仿生构筑超薄MXene/CNC电磁屏蔽复合薄膜[J]. 无机材料学报, 2020, 35(1): 99-104.

LIU Zhang-Shuo, LIU Ji, DAI Yang, LI Xiao-Feng, YU Zhong-Zhen, ZHANG Hao-Bin. Bioinspired Ultrathin MXene/CNC Composite Film for Electromagnetic Interference Shielding[J]. Journal of Inorganic Materials, 2020, 35(1): 99-104.

图/表 4

图1 实验各阶段样品的SEM和TEM照片以及实验制备过程 SEM images of (a) Ti3AlC2, (b) unexfoliated Ti3C2Tx, (c) Ti3C2Tx sheet on AAO, and (d) cellulose; (e) TEM image of CNC; (f) Schematic illustration for the preparation of Ti3C2Tx/CNC composite films; SEM images of the cross-section of (g) Ti3C2Tx film and (h) M60-C40 film

Fig. 1 Morphology and structure of the Ti3C2T

图2 Ti3C2Tx, CNC和Ti3C2Tx/CNC复合薄膜的(a)FT-IR谱图、(b)XPS谱图、(c)XRD图谱和(d)TGA曲线

Fig. 2 (a) FT-IR spectra of Ti3C2Tx, CNC and Ti3C2Tx/CNC films; (b) XPS broad surveys of Ti3C2Tx and Ti3C2Tx/CNC films; (c) XRD patterns of Ti3C2Tx/CNC films; (d) TGA curves of Ti3C2Tx, CNC and Ti3C2Tx/CNC films

图3 (a)不同比例Ti3C2Tx/CNC膜的拉伸强度和韧性统计; (b)Ti3C2Tx膜和M60-C40复合膜的拉伸应力应变曲线; (c)M60-C40 断裂截面SEM照片

Fig. 3 (a) Tensile stress and toughness of Ti3C2Tx/CNC films with different Ti3C2Tx content; (b) Stress-strain curves of Ti3C2Tx film and M60-C40 composite film; (c) Side view SEM image of M60-C40

图4 (a)不同比例Ti3C2Tx/CNC膜的电导率统计; (b)不同比例Ti3C2Tx/CNC膜的电磁屏蔽效能; (c)Ti3C2Tx和M60-C40屏蔽机制图

Fig. 4 (a) Electrical conductivity of Ti3C2Tx/CNC films with different Ti3C2Tx contents; (b) EMI SE of Ti3C2Tx/CNC films with different Ti3C2Tx contents; (c) Total EMI SE (SET) and its absorption (SEA) and reflection (SER) mechanism in Ti3C2Tx and M60-C40

参考文献 18

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仿生构筑超薄MXene/CNC电磁屏蔽复合薄膜

Bioinspired Ultrathin MXene/CNC Composite Film for Electromagnetic Interference Shielding

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